Air-lift.



1. BISGHOPF & J. W. REYNOLDS.

AIR LIFT.

APPLICATION FILED DEG.2B,1910

Patented May 2, 1911.

Witnesses Inventors.

I by

c Attorneys hlhl di'il ldhl Til MIKE P. BISCHOFF AND JQHN W. REYNOLDS, OF ()ILFIELDS, CALIEORNIEL.

AIR-LIFT.

eaosao.

Specification of Letters Patent.

Patented May 2, jig-t '1 application filed December 28, 1910. Serial No. 599,749.

To (1 whom it may concern:

Be it known that we, Minn P. BTSC'IIOFF and JOHN W. Rm'nonns, citizens of the thitedlStates residing at ()ilfields, in the county of Fresno, State of California. ha YO invented a new and' useful AinLitt, of. which the following is a specification.

This invention relates to compressed air ater elevators, and more especially to that class thereof employing an aerated column; and the object of the same is to produce an improved air lift for driving the oil or water out of wells by compressed air.

To this end the invention consists in the peculiar form of valve employed at the lower end of the well casing, all as hereinafter more fully described and claimed and as shown in the accompanying drawings wherein t Figure l is a central longitudinal section through this device complete. Fig, 2 is a cross section on the line 2-2 of Fig. l. Referringto the drawings, the numeral 1 designates the well tubing, which as usual is run into the ground to quite a considerable depth, and the lower end of which extends into the water if it be an ordinary well or into the oil it it be an oil well. The proposition is to raise this water or oil out of the well and upward through this tubing by means of compressed air admitted to the tubing near its bottom, and the numeral 2 designates the air pipe through which the compressed air is supplied.

At the lower ends of the pipes or tubes l and 2 we insert a coupling or casting 3 cored throughout its length as at 4 for the upward passage of the fluid being raised, and cored alongside the said principal coring and'as zit-5 for a porlion of its length from its upper end downward and the lower end of this smaller core 5 is connected transversely as at 6 with the larger core 4c. This transverse passage 6 may be threaded as at 7 shown, and into it is screwed an elbow 8 whose inner 'end stands upward and is internally threaded as at 9. Into this threaded end of the elbow is screwed an upright valve casing comprising two parts. The lowermost part 10' is reduced'and shouldered at its upper end at 11 and screw threaded above the shoulder as at 12, and the uppermost part isa cage of the ordinary type having a rounded up per end 14 and upright side bars 15 usual. Within this cage is disposed a ball-l6 which of course can rise and tall therein and which when it falls rests u on the valve seat which is a ring 17 Inounte within the upper member 13 and resting upon the upper extremity of the lower member 10. By this construction it is possible to separate the two members and replace the valve seat when the same becomes worn.

With this construction of parts, the tubit ing 1 being already in the well as isthe compressed alr supply pipe 2, the alr enters through the elbow 8 and passes upward through the valve casing and raises the ball, divor ing under its end 11- as shown by the arrows, and passing thence upward and driving upward the oil or water within the well. We have found by experience that when the ball valve is so protected by the cage and by the upper end 14, the sa which often occurs in wells of this ci iaracrer will not drop into the valve seat and pre vent the closure of the ball upon it when. the compressed air is shut off. It therefore follows that a device of this character has longer life ands-is less liable to being; aeei-' dentally throvx i' out of use by stoppa 'e of this nature. At the same time the entire casting can removed when desired to gain access to "the interior for repairs What is claimed is; 7 I An air lift for wells comprising; a casting cored throughout fol-the passage of the fluid being elevated and cored alongside the main core for the admission of the 00m: pressed air, the two cores being connected by a transverse passage at the lower end of the air inlet and said ed, an elbow screwed into said threads and whose inner end rises within the main core, a two-part valve casing whereof the lower part leads upward from said elbow and 1S reduced and threaded at its upper end and theupper part has side bars and a rounded assage being threadand closed 11 per end forming aca e while itsdlogvei'1 e11 screws arounld the threadeg natures in the presence of two witnesses. en 0 t e ower art, a Va ve seat screwe into th lower en zl of the upper part and 5 resting upon the u per end of the lower art, and a ball Va ve above said seat and Witnesses: oose within the cage. E. L. ARNOLD, In testimony that we claim the foregoing A. F. ULLER.

as our own, we have hereto affixed our sig- 

